Effect of iodine incorporation on the electrical properties of amorphous conducting carbon films

Kumari, Latha and Prasad, V and Subramanyam, SV (2003) Effect of iodine incorporation on the electrical properties of amorphous conducting carbon films. In: Carbon, 41 (9). pp. 1841-1846.

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Abstract

In this work, the influence of iodine incorporation on the electrical properties of amorphous conducting carbon films, prepared by the vapor phase pyrolysis of maleic anhydride, is reported and discussed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies reveal structural changes in the system. The anomalous behavior in the electrical properties of the intercalated system at low temperatures is investigated. The system shows a positive temperature coefficient of resistance (TCR) at low temperatures, which suggests reasons for the induced ordering of the system at low temperatures with the iodine incorporation. Also, a systematic increase in the conductivity of the sample is observed. The crossover temperature depends on the disorder in the system. The results indicate the possibility of metal-insulator (M-I) transition as a function of preparation temperature, iodine concentration and magnetic field.

Item Type:	Journal Article
Publication:	Carbon
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	A. Carbon films;B. Pyrolysis;C. Scanning electron microscopy;D. Electrical properties
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	23 Apr 2007
Last Modified:	19 Sep 2010 04:37
URI:	http://eprints.iisc.ac.in/id/eprint/10683

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